saline or alkaline soil,soil microorganism,high throughput sequencing,bacterium community,diversity,Xinjiang ,"/> <p class="MsoNormal"> <b>Diversity of Bacterium Communities in Saline or Alkaline Soil in Arid Area</b>

Arid Zone Research ›› 2019, Vol. 36 ›› Issue (5): 1202-1211.doi: 10.13866/j.azr.2019.05.18

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Diversity of Bacterium Communities in Saline or Alkaline Soil in Arid Area

WANG Wei-qi, Li Bian-bian, ZHANG Jun, YANG Lei, ZHANG Feng-hua   

  1. Key Laboratory of Oasis Eco-agriculture of Xinjiang Corps of Production and Construction, Shihezi University, Shihezi 832003, Xinjiang, China
  • Received:2018-11-20 Revised:2019-03-11 Online:2019-09-15 Published:2019-09-11

Abstract: The high throughput sequencing was used to sequence the bacterium communities in four types of saline or alkaline soil including the sulfate-chloride, chloride-sulfate, carbonate and sulfate types. The 137 822 gene sequences were obtained from the soil samples. The results revealed that the Shannon and Chao1 indexes were in an order of carbonate > sulfate > sulfate-chloride > chloride-sulfate, which indicated that the diversity and abundance of soil bacterial communities in carbonate soil samples were significantly higher than those in the other soil samples. In this study, the saline or alkaline soil was mainly comprised of ten phyla. The dominant bacterial phyla were the Proteobacteria, Bacteroidetes and Actinobacteria in sulfuric acid-chloride, chlorinated-sulfate and sulfate soils separately. The Firmicutes, Proteobacteria and Actinobacteria were the dominant populations in carbonate soil. At the genus level, the composition of soil bacterial communities was different from each other. As shown in the cluster analysis, the bacterial communities of all soils were divided into three groups. One was made up of sulfuric acid-chloride salt and chlorinated-sulfate soils, and the others were composed of sulfate and carbonate soils. Effects of the contents of total salt, chlorine, sulfate and nitrates on the bacterial communities were significant (P< 0.05). There were the significant differences in bacterial communities within several types of saline or alkaline soil in the Manas River Basin, and also many types of bacterial communities, especially in carbonate-type soils. The results revealed the composition of bacterial communities in different types of saline or alkaline soil and the main environmental factors affecting the community composition, which provided a scientific basis for developing the microbial resources in saline or alkaline soil and improving it.

Key words:

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saline or alkaline soil, soil microorganism, high throughput sequencing, bacterium community, diversity, Xinjiang